ShapeDetection: implement barcode detection, blink part

third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html

Index: third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
diff --git a/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html b/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
index 7f62e5c8f7cf51e256a15f615b4bd83a383508f2..233dca453bb9335eb4fcee6946ccef0f805476ba 100644
--- a/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
+++ b/third_party/WebKit/LayoutTests/fast/shapedetection/shapedetection-empty-input.html
@@ -4,22 +4,27 @@
 <script>
 
 // This test verifies FaceDetector.detect() with an empty HTMLImageElement.
-async_test(function(t) {
-  var image = new Image();
-  var faceDetector = new FaceDetector();
-  var tryFaceDetection = function() {
-    faceDetector.detect(image)
-        .then(faceDetectionResult => {
-          assert_equals(faceDetectionResult.length, 0);
-          t.done();
-        })
-        .catch(error => {
-          assert_unreached("detect() rejected with error: " + error)
-        });
-  };
-  image.onload = tryFaceDetection;
-  image.onerror = tryFaceDetection;
-  image.src = "";
-}, "FaceDetector should resolve empty images with empty results.");
+var makeAsyncTest = function(detectorName) {

[xianglu, 2016/11/15 19:19:29]

Consider changing this name to something more explanatory like: testEmptyInput?
This also applies to other test files.

[mcasas, 2016/11/15 20:22:55]

Done renaming after offline discussion.

+  async_test(function(t) {
+    var image = new Image();
+    var detector = eval("new " + detectorName + "();");
+    var tryDetection = function() {
+      detector.detect(image)
+          .then(detectionResult => {
+            assert_equals(detectionResult.length, 0);
+            t.done();
+          })
+          .catch(error => {
+            assert_unreached("detect() rejected with error: " + error)
+          });
+    };
+    image.onload = tryDetection;
+    image.onerror = tryDetection;
+    image.src = "";
+  }, "Detectors should resolve empty images with empty results.");
+};
+
+generate_tests(makeAsyncTest, [["Face", "FaceDetector"],
+                               ["Barcode", "BarcodeDetector"]]);
 
 </script>